Marimo-Bead-Supported Core-Shell Nanocomposites of Titanium Nitride and Chromium-Doped Titanium Dioxide as a Highly Efficient Water-Floatable Green Photocatalyst
Marimo-Bead-Supported Core-Shell Nanocomposites of Titanium Nitride and Chromium-Doped Titanium Dioxide as a Highly Efficient Water-Floatable Green Photocatalyst
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DOI：
10.1021/acsami.0c03781
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发表时间：
2020-07-15
影响因子：
9.5
通讯作者：
Nagao, Tadaaki
中科院分区：
文献类型：
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作者：
Kaur, Manpreet;Shinde, Satish Laxman;Nagao, Tadaaki
未经处理的工业废水的排放对环境造成了有害影响。在这方面，开发环境友好的催化剂至关重要。在这里，我们报告了一种高效的和可重复使用的核-壳TiN/SiO2/Cr-TiO 2（TSCT）光催化剂，它是由SiO2包覆的氮化钛（TiN）纳米粒子（NPs）装饰与Cr掺杂的TiO 2 NPs去除水中的有机污染物。TiN NP用作主要的光吸收剂组分，与Cr-TiO 2 NP一起沿着具有优异的可见光吸收。TSCT显示出显着的改善，在光分解亚甲基蓝（MB）的Cr-TiO 2和TiO 2纳米粒子。通过采用海藻酸钙珠（P-Marimo珠）作为支撑我们的TSCT的透明支架，提出了一种有效的结构设计，该支架使自然漂浮在水面上，实现了易于处理以及多用途水净化的良好可重复使用性。令人惊讶的是，我们的TSCT被发现即使在照明关闭后仍保持其催化活性。我们提出的P-Marimo封装的TSCT可以用作优良的绿色光催化剂，具有高的光催化性能，良好的可回收性，易于处理。
The release of untreated industrial wastewater creates a hazardous impact on the environment. In this regard, the development of an environmentally friendly catalyst is of paramount importance. Here, we report a highly efficient and reusable core-shell TiN/SiO2/Cr-TiO2 (TSCT) photocatalyst that is composed of SiO2-cladded titanium nitride (TiN) nanoparticles (NPs) decorated with Cr-doped TiO2 NPs for the removal of organic contaminants from water. The TiN NPs serve as the main light absorber component with excellent visible-light absorption along with Cr-TiO2 NPs. The TSCT shows remarkable improvement in the photodecomposition of methylene blue (MB) over Cr-TiO2 and TiO2 NPs. An efficient structural design is proposed by adopting calcium alginate beads (P-Marimo beads) as a transparent scaffold for supporting our TSCT, which floats nature on the water surface and realizes easy handling as well as excellent reusability for multipurpose water purification. Surprisingly, our TSCT is found to keep its catalytic activity even after the illumination is turned off. Our proposed P-Marimo-encapsulated TSCT can be utilized as an excellent green photocatalyst with high photocatalytic performance, good recyclability, and easy handling.